package com.atguigu.lease.web.app.service.impl;


import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.common.utils.VerifyCodeUtil;
import com.atguigu.lease.model.entity.UserInfo;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.app.mapper.UserInfoMapper;
import com.atguigu.lease.web.app.service.LoginService;
import com.atguigu.lease.web.app.service.SmsService;
import com.atguigu.lease.web.app.vo.user.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private SmsService smsService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Autowired(required = false)
    private UserInfoMapper userInfoMapper;

    @Override
    public void getCode(String phone) {
        // 判断手机号是否为空
        if (!StringUtils.hasText(phone)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_PHONE_EMPTY);

        }

        // 验证码的 key
        String key = RedisConstant.APP_LOGIN_PREFIX + phone;

        // 判断 redis中是否已包含手机号的 key
        Boolean bool = stringRedisTemplate.hasKey(key);
        if (bool) {
            // 获取的验证码还有多长时间过期
            Long expire = stringRedisTemplate.getExpire(key, TimeUnit.SECONDS);

            // 验证码总有效时间
            Integer totalTime = RedisConstant.APP_LOGIN_CODE_TTL_SEC;

            // 判断是否在 60秒内发送过验证码
            if (totalTime - expire <= 60) {
                throw new LeaseException(ResultCodeEnum.APP_SEND_SMS_TOO_OFTEN);
            }
        }

        // 生成随机 6位验证码
        String code = VerifyCodeUtil.generateVerifyCode(6);

        // 发送生成的验证码
        smsService.sendSms(phone, code);

        // redis保存生成的验证码
        stringRedisTemplate.opsForValue().set(key, code, RedisConstant.APP_LOGIN_CODE_TTL_SEC, TimeUnit.SECONDS);
    }

    @Override
    public String login(LoginVo loginVo) {
        String code = loginVo.getCode();
        String phone = loginVo.getPhone();
        if (!StringUtils.hasText(code)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_EMPTY);
        }
        if (!StringUtils.hasText(phone)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_PHONE_EMPTY);
        }

        // 获取 redis中存储的验证码并进行验证
        String key = RedisConstant.APP_LOGIN_PREFIX + phone;
        String redisCode = stringRedisTemplate.opsForValue().get(key);
        if (redisCode == null) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_EXPIRED);
        }
        if (!redisCode.equals(code)) {
            throw new LeaseException(ResultCodeEnum.APP_LOGIN_CODE_ERROR);
        }

        // 查询 phone是否存在于数据库中并对状态进行判断
        UserInfo userInfo = userInfoMapper.selectOne(new LambdaQueryWrapper<UserInfo>()
                .eq(UserInfo::getPhone, phone));
        // 用户不存在直接创建账户
        if (userInfo == null) {
            userInfo = new UserInfo();
            userInfo.setPhone(phone);
            userInfo.setStatus(BaseStatus.ENABLE);
            userInfo.setNickname("用户-" + phone.substring(5));
            // MyBatisPlus主动返回最新的 id值并赋给当前被保存的对象的 id属性中
            userInfoMapper.insert(userInfo);
        }
        if (userInfo.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.APP_ACCOUNT_DISABLED_ERROR);
        }

        // 登入成功，生成token
        String token = JwtUtil.createToken(phone, userInfo.getId());

        return token;
    }
}
